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DOLTON, Ill. — Police in Dolton are searching for a person in connection with an armed robbery in which a second alleged robber was shot and a police officer injured.

The incident happened around 1 p.m. Monday in the 500 block of Sibley Boulevard in Dolton. Police said two people entered the Sibley Car Credit Inc. car dealership and announced a robbery. Police said the alleged robbers took a wallet and a gun from the dealership manager.

A police officer arrived at the scene as the offenders were leaving the dealership. The officer and the men exchanged gunfire.

The officer, who is a 21-year veteran of the force, hurt his shoulder but as he retreated he managed to defend himself and shot one of the suspects in the leg.

Some witnesses told WGN News they heard at least 20 rounds of gunfire.

The officer was taken to the hospital with non-life threatening injuries.

The wounded offender, who is 19-years-old, was taken to the hospital. His condition is not yet known.

One gun was recovered from the scene that authorities said belongs to the 19-year-old.

The search for the second man continues. Officers from multiple jurisdictions including the Illinois State Police and the Cook County Sheriff's Department are involved in the search. Police are asking anyone with any information to contact authorities.